Transit



Patented Dee. 1951922.v

iGfNAcro .LPEZ Benenthnrgerf1vinX1co,r/rnx1oo. j

TRANSIT. j'

eppncanoneiedvrnarehjso,dem. lsinaifno-4se3-5.

e it `ilnioei'ii lthat LGNAGIO :Lpez BAN;- Rn citilf-ienei the :UnitedMexican States,

.l i/ '.1. J .\f 2,1. p g at idexicc city, .Federal zlhstiict, f' \1ifo,ha-ve invented certainnew andeuse- `nroile-,ments in Transitdet which`the isa speciicat'ien.

rule, mounted ontstl :wupor anjccmnicn 1. achjime- "ing fvaith tlieverticali oirelef, 'and the runner -beinigpositively een# nected 'bygearing` to vthe :telescope which then .insmits increment to therunnermak-y ing; it slide on the scales, when the telescope is revolved.. l

` 'lfhe object is to eomplete the wor;` done 'with the stadin,making` itpossible on the spot to determine bothYthe'ihorizontal disfrom theob'ect directed at and also the .ri-nre in level between the #ameaxisand he peint ci" the i'ieldtoivard which the visual im is directed.

rule, l am enabled to read and rerti'l'y on the .field all theincasmfeinents otherwise, only obtainable by calculation in oiiice. Fig;1 is side View et a 'transit equipped with the invention.

Fig. 2 is a fragment-al transverse vertical section of 1. Y

Fig. 3 is a front view of 1.

5 ln the drawing is shown a ,common transit comprising` two invertedU-shaped uprights 1 between the arch portions of `vhich the trunnions 2et' the telescope 3 are mounted, one trunnion also carrying' thevertical circle e. f

'llo the end of the other trunnion Q is fixed a spur wheel engaging atthe ratio et 4l--1 with a spur pinion 6 of Very line pitch iixed toaruimer sha-tt iT revolving;` in a journal .S o disposed between the legsot the'adjacent upright 1 and supported en bridge piece 9 clamped tosaid legs by set screws 10.,v

From 'the bridge 9 two brackets 11 project i 'forward and' are .fastenedto the horizontal arms 12 ot the stationary spider 12%. `The spider isprovided with a concentric groove 11 in which the annula Y rib on'theback .of

circular slide 15 mores. 'Theslide 15 is also ve ition .refers Ito a4circular `:trigtzince which separates the, optical :finis ot theyspider 13.

y `inside the huh oit 'thefspider- *A18 :andiloosely Y Y supported :tromishaift 'i' :is fhung a thrust fr@ i for'ithe purpose di .clampingthe`-slidei15 to arm 18 when tine adjustment is p'enforined by screw 20;

j-sistingfarrn181provided .initalia screw 19 ,used i From theishattTisbrilgidly suspended the runner .arm .21 provided with a :heir .lineandanranged to slidegin cut, y lontsion thefrmgslrand 1171.V f

j iilhe munnen iis rigidly fixed to @heeft 7. but has no contact withslide 15 which, ior

adjustment, is only lmoved :by hand,y as for n instance by inserting thepoint of a pencil in oneofthe three holes. The-screw 2O is secured inarm 18, and the spider 13 and arm 18 arejhung on shaft 7 and are keptstationary, although the'shaft 7 turns. There is no connection,between`:ii-m21 and slide'l; arm llbeing` adjusted by screw 2O and liXed byscrew 19 to arm 18 which held' by brackets 11. j v

The outerv ring- 16 is provided with .outer grziduations f for readingrthe vertical distance between the optical axis' of the telescopennd theobject,jwhich latter, Aseen at the indicated inclination angle, isA at adis. tance of. 100 of the units of measure selected for determiningthetelemetric dis` tance. 1t is to be understood that the stadia rod isheld vertical at all times. j This gives the formula Hkz-S sin QA, inwhich H is the elevation distance, 5:10() and A--the angle ofinclination.

The hair line 22 therefore gives the value of H at 100 units distance,and by omitting` two gures the .distance in elevationof each unit isread.v This distance, when used'together with the inner logarithmiclgraduation and the movable logarithmic slide 15 gives the product ofthe two `factors multiplied together, which is the result sought. Inother words, the. real vertical elevation between the telescopeandobject is thus read.

The inner ring' 17jhas gradnations .tor 'recording horizontal distancesbetween the rtelescope. and thel object. destined to Ae'ivedirectly thevalue of a distance equalto 1GO units ras seen under the vindicatedinclinavtion angle. f j c ,This gives the: torniulaLIS cos QA, inr

which L is the horizontal distance; 8:1100

units and A is the inclination angle under. which the telemetric reading.Wasmade Therefore the hair line 22 gives,v When two figures areomitted, the value of correction by lineal unit.

Now, by moving the point 1 of the slide 15 to correspond, on theinner-graduation of the ring 16 with the distance read on the stadia,the verticalelevationfis read under thenumber of the slide correspondingwith the number given bythe runner on the outer V'graduation of the ring1,.and the horizontal ldistancexis read 1n the same .manner on thegraduation ofvring 17. i

Of course, the runner may be mounted directly on the trunnion and thescale rings arranged concentrically therewith, although the amplifiedmovement to the runner thenilost; g

Whatwl claim is v 1 ,In av transit, the vcombinatiomxvvith a telescopeand a support, of stationary circular logarithmic scales lmounted onsaid support; a kmovable circular logarithmic r3. In a transit7 thecombination7 With a telescope and a support, of a stationary circularscale member having ,logarithmic scales; a stationary circular scalemember lhaving a logarithmic scale;v a! logarithmic scale slidecooperative With said scale members; and arunner movable along saidscale ymembers and slide and connected with the telescope to be operatedthereby.

In testimony whereof I have 'affixed my signature.-

1eNAoioLornZ BANC/Aram;

